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Merge pull request #7330 from donaldsharp/zebra_use_after_free

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zebra: Fix use after free in debug path
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Donatas Abraitis 2020-10-17 20:24:11 +03:00 committed by GitHub
commit f41688b423
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1 changed files with 10 additions and 1 deletions
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11
zebra/zebra_rib.c
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@ -2268,9 +2268,18 @@ static void process_subq_route(struct listnode *lnode, uint8_t qindex)
rib_process(rnode);
if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
struct route_entry *re = re_list_first(&dest->routes);
struct route_entry *re = NULL;
char buf[SRCDEST2STR_BUFFER];
/*
* rib_process may have freed the dest
* as part of the garbage collection. Let's
* prevent stupidity from happening.
*/
dest = rib_dest_from_rnode(rnode);
if (dest)
re = re_list_first(&dest->routes);
srcdest_rnode2str(rnode, buf, sizeof(buf));
zlog_debug("%s(%u:%u):%s: rn %p dequeued from sub-queue %u",
zvrf_name(zvrf), zvrf_id(zvrf), re ? re->table : 0, buf,